Stuck injector???
12-02-2011, 07:38 PM
#1
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Location: GC, Michigan
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Year: 98
Model: Cherokee
Engine: 4.0
Stuck injector???
Has anyone had any problems with there in injectors stuck open when running? my xj the upstream o2 is running rich! also i got back firing in the intake!
any ideas????
any ideas????
12-02-2011, 07:51 PM
#2
CF Veteran
I had one that I damaged changing O-Rings, don't ask, anyway it started and ran with a miss at idle and smoothed out at mid rpm and wide open.
Not really any popping back through the intake.
I was just lucky enough that when I pulled them I can see one looked different than the others in that the tip looked wet compared to the others. The engine was still very warm when I pulled them.
Not really any popping back through the intake.
I was just lucky enough that when I pulled them I can see one looked different than the others in that the tip looked wet compared to the others. The engine was still very warm when I pulled them.
12-02-2011, 09:06 PM
#3
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Year: Several
Model: Cherokee
Engine: 4.0
Intake manifold leak - puts too much O2 on the exhaust, ECM richens it too much, end result is rich.
Do a smoke test to find the leak.
Do a smoke test to find the leak.
12-03-2011, 02:14 PM
#4
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Year: 98
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